Retrospective commit from 2009-08-12.

Retrospective commit from 2009-08-12.

An (unsuccessful) attempt to solve the issue with row->start and row->end.

 xdisp.c (set_iterator_to_next, reseat, reseat_1)
 (reseat_at_next_visible_line_start): Accept additional argument
 force_logical_p; all callers changed.  If force_logical_p is
 non-zero, force iteration in buffer's logical order even in bidi
 buffers.
 dispnew.c (direct_output_for_insert): Call set_iterator_to_next
 with additional argument zero.
 dispextern.h (set_iterator_to_next): Now accepts an additional
 argument.